Lamp



FIG. 1 is a frontal perspective view showing my new design;

FIG. 2 is a top view thereof;

FIG. 3 is a frontal view thereof;

FIG. 4 is a frontal view rotated 45° about a vertical axis when taken with respect to the frontal view of FIG. 3; and,

FIG. 5 is a bottom view thereof. 

The ornamental design for a lamp, as shown and described. 